//package com.demo.config;
//
//import org.springframework.security.access.AccessDecisionManager;
//import org.springframework.security.access.AccessDeniedException;
//import org.springframework.security.access.ConfigAttribute;
//import org.springframework.security.authentication.AnonymousAuthenticationToken;
//import org.springframework.security.authentication.BadCredentialsException;
//import org.springframework.security.core.Authentication;
//import org.springframework.security.core.AuthenticationException;
//import org.springframework.security.core.GrantedAuthority;
//import org.springframework.stereotype.Component;
//
//import java.util.Collection;
//import java.util.Iterator;
//
//
//@Component("urlAccessDecisionManager")
//public class UrlAccessDecisionManager implements AccessDecisionManager {
//
//
//    @Override
//    public void decide(Authentication auth, Object o, Collection<ConfigAttribute> collection) throws AccessDeniedException, AuthenticationException {
//        Collection<? extends GrantedAuthority> authorities = auth.getAuthorities();
//        Iterator<ConfigAttribute> iterator = collection.iterator();
//        while (iterator.hasNext()) {
//            ConfigAttribute ca = iterator.next();
//            //当前请求需要的权限
//            String needRole = ca.getAttribute();
//            if ("ROLE_LOGIN".equals(needRole)) {
//                if (auth instanceof AnonymousAuthenticationToken) {
//                    throw new BadCredentialsException("用户未登录");
//                } else {
//                    return;
//                }
//            }
//            //当前用户所具有的权限
//            for (GrantedAuthority authority : authorities) {
//                if (authority.getAuthority().equals(needRole)) {
//                    return;
//                }
//            }
//        }
//        throw new AccessDeniedException("权限不足!");
//    }
//
//
//
//
//    @Override
//    public boolean supports(ConfigAttribute configAttribute) {
//        return true;
//    }
//
//    @Override
//    public boolean supports(Class<?> aClass) {
//        return true;
//    }
//}
